Unexpected stability of the iron(II) complex by an asymmetrical Schiff base from Fe(III): structure, magnetic and Mössbauer investigations

The asymmetric Schiff base prepared <i>in situ</i> from ethylenediamine and pyridine-2-carboxaldehyde reacts with Fe(ClO<sub>4</sub>)<sub>3</sub>·6H<sub>2</sub>O to form the Fe(II) complex [FeL<sub>2</sub>](ClO<sub>4</sub>)<sub>2</sub> with L = <i>N</i>,<i>N</i>-diethyl-<i>N</i>'-(pyridin-2-yl)methylene)ethane-1,2-diamine, where the Fe(III) starting material has been unexpectedly reduced to Fe(II). This complex was characterized by elemental analysis, infrared spectra, single crystal and powder X-ray diffraction measurements, variable temperature DC magnetic measurement and room temperature Mössbauer spectroscopy. The asymmetric ligand L coordinates in a tridentate fashion through its pyridyl, azomethine and amino nitrogen atoms, generating a distorted octahedral geometry around the central metal ion. Variable temperature magnetic studies and a Mössbauer measurement show that the iron is locked in the low spin Fe(II) states.

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Publication Details

Journal
Royal Society Open Science
Published
2025-01-01
DOI
https://doi.org/10.1098/rsos.241334
Citations
3
Primary Topic
Metal complexes synthesis and properties
Type
article
Field-Weighted Citation Impact
3.14
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article

Unexpected stability of the iron(II) complex by an asymmetrical Schiff base from Fe(III): structure, magnetic and Mössbauer investigations

Annie K. Powell, Taju Sani, Christopher E. Anson, Jonas Braun et al.
3 citations
Royal Society Open Science
Metal complexes synthesis and properties
3.14
article

Unexpected stability of the iron(II) complex by an asymmetrical Schiff base from Fe(III): structure, magnetic and Mössbauer investigations

Annie K. Powell, Taju Sani, Christopher E. Anson, Jonas Braun, Madhu Thomas, Sébastien Diliberto, Pascal Boulet, Dawit Tesfaye, Nandakumar Kalarikkal, Mamo Gebrezgiabher
article en
3 citations

Abstract

The asymmetric Schiff base prepared <i>in situ</i> from ethylenediamine and pyridine-2-carboxaldehyde reacts with Fe(ClO<sub>4</sub>)<sub>3</sub>·6H<sub>2</sub>O to form the Fe(II) complex [FeL<sub>2</sub>](ClO<sub>4</sub>)<sub>2</sub> with L = <i>N</i>,<i>N</i>-diethyl-<i>N</i>'-(pyridin-2-yl)methylene)ethane-1,2-diamine, where the Fe(III) starting material has been unexpectedly reduced to Fe(II). This complex was characterized by elemental analysis, infrared spectra, single crystal and powder X-ray diffraction measurements, variable temperature DC magnetic measurement and room temperature Mössbauer spectroscopy. The asymmetric ligand L coordinates in a tridentate fashion through its pyridyl, azomethine and amino nitrogen atoms, generating a distorted octahedral geometry around the central metal ion. Variable temperature magnetic studies and a Mössbauer measurement show that the iron is locked in the low spin Fe(II) states.

Royal Society Open ScienceVol. 12(1)
Karlsruhe Institute of Technology (DE), Centre National de la Recherche Scientifique (FR), Mahatma Gandhi University (IN), Addis Ababa Science and Technology University (ET), Institut Jean Lamour (FR), Université de Lorraine (FR)
Clean water and sanitation
Openalex Percentile: Top 10%
Metal complexes synthesis and properties
3.14
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Unexpected stability of the iron(II) complex by an asymmetrical Schiff base from Fe(III): structure, magnetic and Mössbauer investigations — Annie K. Powell, Taju Sani, et al. · Royal Society Open Science (2025) | TGRS Research Map | TGRS